This could be possible. I had the opportunity to run a 5.0 with the exact mods as the one you ran, at a Shift-S3ctor side-by-side roll-on event. The owner of the 5.0 showed me a dyno sheet of it making 451 RWHP, so I was impressed at the delta from a stock 5.0 which I'm assuming is maybe 350-375 RWHP. Your ESS 575 makes what, around 500 RWHP?